Automatic lock-nut.



E. E. BRUBAKER.

AUTOMATIC LOCK N UT. APPLICATION LED AUG.30| 1912.

Patented J une 1, 1915.

TinTTnn STATES PATENT oTTTcn.

ERWIN E. BRUBAKER, OF KISKIMINETAS TOWNSHIP, ARMSTRONG COUNTY, PENN- SYLVANIA.

AUTOMATIC LOCK-NUT.

Specification of Letters Patent.

Patented June 1, 1915.

Application filed August 30, 1912. Serial N 0. 717,979.

To all whom it may concern:

Be it known that I, ERWIN E. BRUBAKER, a citizen of the United States, residing in Kiskiminetas township, in the county of Armstrong and State of Pennsylvania, have invented a new and useful Automatic Lock- Nut, of which the following is a specification.

My invention relates to an improved automatic nut lock.

The essential object of my invention is to provide a simple and eflicient automatic nut lock so constructed that releasing the lock and unscrewing the nut are accomplished by one and the same operation.

With the foregoing and other objects in view my invention consists in novel features, parts and combinations which will be hereinafter fully described and specifically pointed out in the appended claim.

To obtain a full and correct understanding of the details of construction and combination of features, reference is to be had to the detail description and the accompanying drawings taken in connection therewith, wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a side elevation of my nut lock; Fig. 2 is a side elevation of my nut lock parts broken away to disclose details; and Fig. 3 is an end elevation of my nut lock. 7

Referring to the accompanying drawings, A designates a shank, carrying upon its threaded section anut B, the said nut having recesses B formed within-its outer face. Pivotally mounted within these recesses by means of pins F, are pawls G, the said pawls being actuated by the spiral springs E, which latter are seated in niches E formed in the bottom of the recesses B. The said pawls O are formed conveniently by cutting sections from a bar having substantially'a rhomboidal section. The sides of the pawls C being engaged by the spiral springs E which are intended to normally force the Copies of this patent may be obtained for five cents each, by addressing the pawls with the engaging points C inwardly. These points C are adapted to engage in longitudinal grooves D arranged in the threaded section of the shank A while the opposite points O of the pawls G extend beyond the outer wrench-engaging surface of the nut.

By the arrangement of the parts as described it is only necessary in operating the device to turn the nut B with a wrench so disposed that the points C of the pawl C are depressed thereby,- bringing the points 0 out of alinement with the grooves D which in turn will allow free movement of the nut in either direction. Upon disengaging the wrench from the nut B the pawls C will again be forced back in the grooves D by the spiral springs E, thereby locking the nut.

I desire it to be understood that I may make slight changes in the construction of the members of my invention without departing from the spirit thereof, provided such changes fall within the scope of the subjoined claim.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

In a device of the character described the combination of a screw threaded shank having a plurality of longitudinally extending diametrically opposite grooves arranged in the screw threaded section of the shank, a nut having recesses formed within its outer face, pawls of substantially a rhomboidal shape in elevation pivotally mounted Within said recesses, said pawls being disengaged from the shank and lying flush with the nut when engaged by a wrench, and the inner acute angle engaging the grooves in said shank and the outer acute angle extending beyond the outer wrench engaging surface of the nut when in locked position.

ERWIN E. BRUBAKER.

Witnesses:

THOMAS T. HiLTY, JOHN GUTHRIE.

Washington, D. G. 

